I really like Fujifilm 160S. Shadows stay pretty neutral. Reala in medium-format is also outstanding, but I just think 160S has better microcontrast. Also, it is a very close match to my digital camera so I can shoot formats interchangeably without headaches.

For trannies, Provia 100F does a nice job of color shifting in long-exposures which warms things up without shifting the white-balance. Dusk/Dawn shots in the 30-120 second range will yield colors and intensities in the reds, purples and yellows not seen by the human eye. The color shift is not linear (like digital imaging), but generally keeps the subject (buildings in your case) from going off balance.

If you need a little extra punch on dull days or drab subjects, Ektar 100.
Otherwise, it's hard to go wrong with any flavor of 160 negative film from both sources.
Portra 800 is fun when you feel the need for speed.

Wayne
Deep in the darkest heart of the East Texas Rain forest. Apprentice Analog Activist.